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. 1987 Aug;52(2):177–186. doi: 10.1016/S0006-3495(87)83205-8

Use of cell contour analysis to evaluate the affinity between macrophages and glutaraldehyde-treated erythrocytes.

J L Mege 1, C Capo 1, A M Benoliel 1, P Bongrand 1
PMCID: PMC1330069  PMID: 3117125

Abstract

Recently, several authors evaluated the affinity between lipid bilayers or erythrocyte membranes by analyzing the deformation of cells or vesicles they brought into close contact using micromanipulators. In the present report, we extend this approach in a study of the adhesive properties of rough nucleated cells. Rat peritoneal macrophages were made to bind human red cells modified with glutaraldehyde or glutaraldehyde and polylysine. Conjugates were examined with electron microscopy, and photomicrographs were digitized for quantification of cell surface roughness in and out of adhesion areas. Also, macrophages were subjected to micropipette aspiration to find a relationship between apparent surface tension and area increase. Assuming that this increase was a direct consequence of a smoothing of the cell surface on the submicrometer scale, the actual affinity between macrophages and erythrocytes was estimated. The obtained values ranged between 8.4 X 10(-5) and 18.2 X 10(-5) J/m2. It is concluded that cell surface roughness may be an important parameter of cell adhesion and perhaps deformation. This is made amenable to experimental study by the present approach.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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